Pyrone
Pronunciation : Py`rone, n. [G. pyron
Part of Speech : an
Definition : Defn: An unsaturated cyclic compound, C5H4O2, of which two varieties are known, a and g. g-pyrone is the parent substance of several natural yellow dyestuffs.
abbr. of pyrokoman.] (Org. Chem.)
Source : Webster's Unabridged Dictionary, 1913